Source code for manim.animation.numbers

"""Animations for changing numbers."""

__all__ = ["ChangingDecimal", "ChangeDecimalToValue"]


import typing

from ..animation.animation import Animation
from ..mobject.numbers import DecimalNumber
from ..utils.bezier import interpolate


[docs]class ChangingDecimal(Animation): def __init__( self, decimal_mob: DecimalNumber, number_update_func: typing.Callable[[float], float], suspend_mobject_updating: typing.Optional[bool] = False, **kwargs, ) -> None: self.check_validity_of_input(decimal_mob) self.number_update_func = number_update_func super().__init__( decimal_mob, suspend_mobject_updating=suspend_mobject_updating, **kwargs ) def check_validity_of_input(self, decimal_mob: DecimalNumber) -> None: if not isinstance(decimal_mob, DecimalNumber): raise TypeError("ChangingDecimal can only take in a DecimalNumber")
[docs] def interpolate_mobject(self, alpha: float) -> None: self.mobject.set_value(self.number_update_func(self.rate_func(alpha)))
[docs]class ChangeDecimalToValue(ChangingDecimal): def __init__( self, decimal_mob: DecimalNumber, target_number: int, **kwargs ) -> None: start_number = decimal_mob.number super().__init__( decimal_mob, lambda a: interpolate(start_number, target_number, a), **kwargs )